[Xorg-driver-geode] proposal: set the GPIO to DDC mode during xf86-video-geode initialization

[Martin-Éric Racine]

Greetings,

In relation to X.org bug #22100 [1], a solution has been proposed to
make the Geode X driver set the GPIO MUX into DDC mode, before a
parsing of the display's EDID data is even attempted. Currently, if
the BIOS (or some other tool) has set the GPIO MUX to serial console
mode, our driver crashes.

I would especially like to hear from the OLPC team and from vendors of
Geode-based embedded devices, whether forcing the MUX to DDC upon
initializing the Geode X driver would cause any issue with other
hardware that might be dependent upon the GPIO being set to serial
console.

Martin-Éric

[1] https://bugs.freedesktop.org/show_bug.cgi?id=22100